Under fire in Washington, Trump back in campaign mode in Iowa

By Steve HollandCEDAR RAPIDS, Iowa (Reuters) - U.S. President Donald Trump, under siege in Washington,defended his record at a raucous political rally in Iowa on Wednesday, rejecting a Russia investigation as a witch hunt and saying he was succeeding against all odds, despite no major legislative achievements.A feisty Trump spoke for more than an hour at a rally in Cedar Rapids that was similar to those he held during last year's presidential campaign.It included protesters escorted out by polic